Excavator undercarriage



FIG. 1 is a front, right-side, and top view of an excavator undercarriage showing the new design.

FIG. 2 is a front, left-side, and top view of the excavator undercarriage.

FIG. 3 is a rear, left-side, and top view.

FIG. 4 is a rear, right-side, and top view.

FIG. 5 is a front elevation view.

FIG. 6 is a rear elevation view.

FIG. 7 is a right-side elevation view.

FIG. 8 is a left-side elevation view.

FIG. 9 is a top plan view.

FIG. 10 is a front, right-side, and top view showing the excavator undercarriage as part of a complete excavator.

FIG. 11 is a front, left-side, and top view of the excavator undercarriage as part of a complete excavator.

FIG. 12 is a rear, left-side, and top view.

FIG. 13 is a rear, right-side, and top view.

FIG. 14 is a front elevation view.

FIG. 15 is a rear elevation view.

FIG. 16 is a right-side elevation view.

FIG. 17 is a left-side elevation view; and,

FIG. 18 is a top plan view.

The broken lines in FIGS. 10-18 represent environmental structure, and form no part of the claimed design. 

CLAIM The ornamental design for an excavator undercarriage, as shown and described. 